Pipe joint



June 13, 1950 vA. '.1. TURPIN PIPE-JOINT Filed April@ 1946 ||||l mm WILArron/yay Patented June 13, 1950 UNITED` SITA-fl? PAT ENT'4O"F'l'f'flCE.

` rire JOINT.

Alexander J-. Turpin, Stewart Manor, N..Y., as'- signor. to- Hauck.Manufacturing Company, BrooklymN. Y., a corporation o-f NewYorkApplication April' fi', 1946, Serial No. 6595667' j s claims. (c1.zssis) The invention relates to a novel means forv attaching to thetopof a pressure tank a, generally, manually operable pump forestablishing within the said tank uid pressure. In thus securing thepumpinglmechanism to the top of the tank it has been the practice toweld about the edge of theetank opening, through which a por tion of thepumping mechanism is to be introe duced, a ring which is thereby sealedtoprovide a pressure tight joint. Thesaid ring, moreover, is internallythreaded to receive and retain a bushing element to which has beensoldered or otherwise secured the cylindrical barrel of the pump, sothat by threading the-bushing element into the ring the pump is locatedin position as well as being sealed to the tank against loss of pressuretherein. Or, provision has been made for a lap-joint connection at thetank top opening between an extendedneck portion thereof and a bushingholding'member.

Certain objections are inherent in these connections, for example, inthe case of the welded ring, the latter must be thoroughly weldedthroughout its circumference, which involves the expenditure of time andmaterial, as well as requiring the service of a skilled Welder. Thenecessarily high welding temperature involved heats excessively the topof the tank so that its outer surface oxidizes and scales, thusaffecting the iinish thereof, or the durability of a coatingsubsequently to be applied. In the lap-joint type, a specially formedoutlet of the tank top is required.

It is an object of the present invention to provide a connection whichdoes not require that the securing ring be sealed to the tank top butmerely securely attached thereto as at a number of points, for example,by spot welding it to the outer surface of the top.

A further object of the invention is to provide a joint assembly whichwill require no modification in the surface of the tank top, nor willany marring thereof result from the attachment.

In carrying out the invention, there is provided coaxially about thecustomary opening in the top or a pressure tank an annular member oisubstantially greater opening diameter than the diameter of the saidtank opening, said annular member being attached to the outer surface ofthe top at a suicient number of points to insure proper holding. Thismay conveniently be efiected by spot welding one portion or an angularshaped ring member to said surface, the other portion projecting thenupwardly from the tank top and is internally threaded to receive abushing mem-ber ofthe pump'mechanism. Thesure upon said; gasket bythreading inwardly the said bushing member.

Provision is made forsecuring to the inner end of thebushing member,which is caused to projectinto the tank, the barrel or cylinder of thepump mechanism, such means comprising, for example, a sleeve orextension outwardly therefrom and which is interlocked with the reducedend of the bushing member. 'It may, also, be additionally secured as byAbeingprovi-ded with an outwardly directedl ilangewhich is designed tofit between the gasket andthesh'oulder` of the bushing member.

The nature of the invention, however, will best be understood whendescribed in connection with the accompanying drawings, in which:

Fig. 1 is a fragmentary vertical section of a pressure tank illustratingthe attachment of a pump thereto by the novel means.

Fig. 2 is a plan view thereof; and Fig. 3 is a similar view but with thepump removed.

Referring to the drawings, Il! designates a tank for retaining liquidfuel or other liquid (not shown), a suiciently high pressure beingdesigned to be provided within the tank to expel the liquid for use.This pressure may be established by means of the air pump indicated byits cylinder I I and piston I2, also a piston rod I3 extending through ahead or bushing member I4 and adapted for manipulation by a handle I5secured to the cuter end of the piston rod IB-all of which is wellunderstood and for which no claim is made herein.

However, a novel means for mounting said cylinder on the top of the tankis disclosed whereby it will be sealed to said top in a simple andeffective manner so that no leakage may occur though the pump may bereadily installed in the tank and removed therefrom when this becomesnecessary.

To this end, there is secured about the opening I6 in the tank top andthrough which the pump is to be introduced, an annular member having anopening I1 of a diameter appreciably greater than that of the opening I6in the top of the said tank so as to leave an exposed area I8 of theouter surface of the top about opening indicated at 22, to the topsurface of the tank for example, by spot welding the same, no attempt,however, being made to secure a gas-tight seal between the portion andthe said top surface.

uniform internal diameter greater than the diameter of the top opening,said member having an outwardly-directed ange permanently attached tothe top surface of the tank to afford a nonpressure-tight jointtherewith coaxial with the opening therein and exposing an annular areaof the top about and adjacent said opening, said annular member 4havingalso an internally threaded portion upstanding therefrom coaxial withsaid opening; a bushing member externally threaded to fit the threadedportion of the annular member; and a gasket located between the bushingmember and the said top surface area enclosed by The bushing member is,preferably, of reduced diameter at its inner end aiording a shoulder 23which is adapted to bear upon an annular gasket 24 seated on the exposedsurface area I8 ,Y

about the said reduced inner end. By then screwing in said bushingmember, a tight seal is secured between the pump and the tank to preventloss of pressure through the connection of the former to the latter.

The bushing member I4 is, preferably, constructed as separate from thepump cylinder II which may be extended-outwardly as indicated at 25,slipped over the reduced end of member I4 and then crimped at a numberof points into a circular groove 26 provided in the periphery of saidreduced end of member I4. The extended portion may also be provided withan outwardly directed ange 2l designed to fit over the gasket 24 to holdadditionally the said cylinder and bushing member together.

I claim:

1. Means for sealing a pump to a sheet metal pressure tank provided withan opening in its top, said pump having a cylinder adapted to passthrough said opening into the pressure tank, the sealing meanscomprising an annular member of lthe annular member.

' 2.. The sealing means of claim 1, wherein the bushing member is ofreduced diameter at its inner end to afford a shoulder for exertingpressure upon the gasket when said bushing member is threaded into thesaid annular member.

3. The sealing means'of claim 1, wherein the bushing member is ofreduced diameter at its inner end to afford a shoulder for exertingpressure upon the gasket when said bushing member is threaded into thesaid annular member, and the cylinder of the pump is extended at itsouter end to t over the reduced end of the bushing member and isprovided with an outwardly turned ange to t between the gasket and theshoulder of the bushing member.

v ALEXANDER J. TURPIN.

REFERENCES CITED The following references are of record inthe file ofthis patent:

UNITED STATES PATENTS Number `Name Date 930,845 Dawes Aug. 10, 19091,398,985 Wadley Dec. 6, 1921 r1,402,552 Wackwitz Jan. 3, 1922

